KR20220042602A - Coil component - Google Patents

Abstract

An aspect of the present invention relates to a coil component which comprises: a body having an upper surface and a lower surface which face each other in a direction of thickness; a support substrate disposed in the body and having one surface perpendicular to the lower surface of the body; a coil unit disposed at least on one surface of the support substrate; and first and second external electrodes disposed on the lower surface of the body to be spaced apart from each other and connected, respectively, to the coil unit, wherein the body includes an active unit covering the coil unit and the first and second cover units disposed, respectively, on an upper surface and a lower surface of an active unit, which face each other in the thickness direction. In addition, the active unit includes first magnetic metal powder, second magnetic metal powder having a particle size less than the particle size of the first magnetic metal powder, and a first insulation resin and the first and second cover units, respectively, include a third magnetic metal powder having a particle size less than the particle size of the first magnetic metal powder and second insulation resin. Accordingly, a short circuit between external electrodes can be prevented.

Description

Coil Component {COIL COMPONENT}

The present invention relates to a coil component.

An inductor, one of the coil components, is a typical passive electronic component used in electronic devices along with a resistor and a capacitor.

As electronic devices become increasingly high-performance and small, the number of electronic components used in electronic devices is increasing and miniaturizing.

In the case of a thin-film coil component, a body is formed by laminating and curing a magnetic composite sheet in which magnetic metal powder is dispersed in an insulating resin on a substrate on which a coil part is formed by plating, and an external electrode is formed on the surface of the body.

Korean Patent Publication No. 10-2019-0062342

One of the objects according to an embodiment of the present invention is to provide a coil component capable of easily preventing an electrical short-circuit between external electrodes in a coil component in which the coil unit is vertically disposed on the lower surface of the body. am.

Another object according to an embodiment of the present invention is to provide a coil component capable of increasing an effective volume of a magnetic material in a coil component in which a coil unit is vertically disposed on a lower surface of a body.

According to one aspect of the present invention, a body having an upper surface and a lower surface facing each other in the thickness direction, a support substrate disposed in the body and one surface perpendicular to the lower surface of the body, a coil unit disposed on at least one surface of the support substrate, and first and second external electrodes disposed on a lower surface of the body to be spaced apart from each other and respectively connected to the coil part, wherein the body includes an active part covering the coil part and the active part facing in the thickness direction. and first and second cover portions respectively disposed on upper and lower surfaces, wherein the active portion includes a first magnetic metal powder, a second magnetic metal powder having a particle diameter smaller than that of the first magnetic metal powder, and a first insulating resin and wherein each of the first and second cover parts includes a third magnetic metal powder having a particle diameter smaller than a particle diameter of the first magnetic metal powder and a second insulating resin.

According to an embodiment of the present invention, in the coil component in which the coil unit is vertically disposed on the lower surface of the body, it is possible to easily prevent an electrical short-circuit between the external electrodes.

According to an embodiment of the present invention, in the coil part in which the coil part is vertically disposed on the lower surface of the body, the effective volume of the magnetic material may be increased.

1 is a view schematically showing a coil component according to an embodiment of the present invention.
FIG. 2 is a view showing a cross section taken along line I-I' of FIG. 1;
FIG. 3 is a view showing a cross-section taken along line II-II' of FIG. 1;
4 is a view schematically showing a coil component according to another embodiment of the present invention.
FIG. 5 is a view showing a cross-section taken along line III-III' of FIG. 4;
FIG. 6 is a view showing a cross-section taken along line IV-IV' of FIG. 4;
7 is a view schematically showing a coil component according to another embodiment of the present invention.
FIG. 8 is a view showing a cross-section taken along line V-V' of FIG. 7;
Fig. 9 is a view showing a cross section taken along line VI-VI' of Fig. 7;

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof. And, throughout the specification, "on" means to be located above or below the target part, and does not necessarily mean to be located above the direction of gravity.

In addition, the term "coupling" does not mean only when there is direct physical contact between each component in the contact relationship between each component, but another component is interposed between each component, so that the component is in the other component. It should be used as a concept that encompasses even the cases in which each is in contact.

Since the size and thickness of each component shown in the drawings are arbitrarily indicated for convenience of description, the present invention is not necessarily limited to the illustrated bar.

In the drawings, the L direction may be defined as a first direction or length direction, the W direction may be defined as the second direction or width direction, and the T direction may be defined as a third direction or thickness direction.

Hereinafter, a coil component according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. is to be omitted.

Various types of electronic components are used in electronic devices, and among these electronic components, various types of coil components may be appropriately used for the purpose of removing noise and the like.

That is, in electronic devices, the coil component is used as a power inductor, a high frequency inductor, a general bead, a high frequency bead (GHz Bead), a common mode filter, etc. can be

1 is a view schematically showing a coil component according to an embodiment of the present invention. FIG. 2 is a view showing a cross-section taken along line I-I' of FIG. 1 . FIG. 3 is a view showing a cross-section taken along line II-II′ of FIG. 1 . Meanwhile, in the case of FIG. 2, the cross section taken along line I-I' of FIG. 1 is the reference, but for convenience of explanation, the internal structure of the coil component is shown.

1 to 3 , a coil component 1000 according to an embodiment of the present invention includes a body 100 , a support substrate 200 , a coil unit 300 , and external electrodes 410 and 420 . . The body 100 includes an active part C and first to fourth cover parts 121 , 122 , 123 , and 124 .

The body 100 forms the exterior of the coil component 1000 according to the present embodiment, and the support substrate 200 and the coil unit 300 are embedded therein.

The body 100 may be formed in a hexahedral shape as a whole.

The body 100, the first surface 101 and the second surface 102 facing each other in the longitudinal direction (L), the third surface facing each other in the width direction (W), based on FIGS. 1 to 3 . 103 and a fourth surface 104 , and a fifth surface 105 and a sixth surface 106 facing in the thickness direction T. Each of the first to fourth surfaces 101 , 102 , 103 and 104 of the body 100 is a wall surface of the body 100 connecting the fifth surface 105 and the sixth surface 106 of the body 100 . corresponds to Hereinafter, both cross-sections of the body 100 mean the first surface 101 and the second surface 102 of the body, and both sides of the body 100 are the third surface 103 and the fourth surface of the body. (104) may mean. In addition, the lower surface and the upper surface of the body 100 may mean the sixth surface 106 and the fifth surface 105 of the body 100, respectively.

The body 100 is formed such that, for example, the coil component 1000 according to the present embodiment in which external electrodes 410 and 420 to be described later are formed has a length of 1.0 mm, a width of 0.5 mm, and a thickness of 0.6 mm. Or, it may be formed to have a length of 1.6mm, a width of 0.8mm, and a thickness of 1.0mm, but is not limited thereto. On the other hand, since the above-mentioned numerical value is only a numerical value on design that does not reflect process error, etc., it should be considered that the range that can be recognized as process error belongs to the scope of the present invention.

The length of the above-described coil component 1000 is an optical microscope or SEM for a cross-section in the longitudinal direction (L)-thickness direction (T) in the central portion of the width direction (W) of the coil component 1000 . (Scanning Electron Microscope) Based on the photograph, it may mean the maximum value among the lengths of a plurality of line segments that connect the outermost boundary of the coil component 1000 shown in the cross-sectional photograph and are parallel to the longitudinal direction L . Alternatively, the length of the above-described coil component 1000 refers to a length of at least three or more of a plurality of line segments connecting the outermost boundary line of the coil component 1000 shown in the cross-sectional photograph and parallel to the longitudinal direction L. may mean the arithmetic mean value of

The thickness of the above-described coil component 1000 is an optical microscope or SEM of the longitudinal direction (L)-thickness direction (T) cross-section in the width direction (W) central portion of the coil component 1000 . (Scanning Electron Microscope) Based on the photograph, it may mean the maximum value among the lengths of a plurality of line segments connecting the outermost boundary line of the coil component 1000 shown in the cross-sectional photograph and parallel to the thickness direction T . Alternatively, the thickness of the above-described coil component 1000 refers to a length of at least three or more of a plurality of line segments connecting the outermost boundary line of the coil component 1000 shown in the cross-sectional photograph and parallel to the thickness direction (T). may mean the arithmetic mean value of

The width of the above-described coil component 1000 is an optical microscope or SEM of the longitudinal direction (L)-width direction (W) cross-section at the center of the thickness direction (T) of the coil component 1000 . (Scanning Electron Microscope) Based on the photograph, it may mean the maximum value among the lengths of a plurality of line segments connecting the outermost boundary line of the coil component 1000 shown in the cross-sectional photograph and parallel to the width direction W . Alternatively, the width of the above-described coil component 1000 refers to a length of at least three or more of a plurality of line segments that connect the outermost boundary line of the coil component 1000 shown in the cross-sectional photograph and are parallel to the width direction (W). may mean the arithmetic mean value of

Alternatively, each of the length, width, and thickness of the coil component 1000 may be measured by a micrometer measurement method. The micrometer measurement method is to set the zero point with a micrometer with Gage R&R (Repeatability and Reproducibility), insert the coil part 1000 according to this embodiment between the tips of the micrometer, and turn the measuring lever of the micrometer to measure. can Meanwhile, in measuring the length of the coil component 1000 by the micrometer measurement method, the length of the coil component 1000 may mean a value measured once or may mean an arithmetic average of values measured a plurality of times. . This may be equally applied to the width and thickness of the coil component 1000 .

The body 100 includes magnetic metal powder (P1, P2, P3, P4) and insulating resin (R1, R2, R3). The body 100 is formed by stacking one or more magnetic composite sheets containing an insulating resin (R1, R2, R3) and a magnetic metal powder (P1, P2, P3, P4) dispersed in the insulating resin (R1, R2, R3). can be formed.

The body 100 includes an active part 110 and cover parts 121 , 122 , 123 , and 124 .

Specifically, the active part 110 covers the coil part 300 to be described later, and the first magnetic metal powder P1 and the second magnetic metal powder having a particle diameter smaller than that of the first magnetic metal powder P1 ( P2), and a first insulating resin (R1). The first cover part 121 is disposed on the upper surface of the active part 110 and includes a third magnetic metal powder P3 and a second insulating resin R2 having a particle diameter smaller than that of the first magnetic metal powder P1. do. The second cover part 122 is disposed on the lower surface of the active part 110 and includes a third magnetic metal powder P3 and a second insulating resin R2 having a particle diameter smaller than that of the first magnetic metal powder P1. do. Each of the third and fourth cover parts 123 and 124 is disposed on both sides of the active part 110 facing in the width direction, and the fourth magnetic metal powder has a particle diameter smaller than that of the first magnetic metal powder P1. powder (P4) and a third insulating resin (R3). Meanwhile, in the present specification, the particle size or average diameter of the magnetic metal powder may mean a particle size distribution expressed as D50 or D90.

The active unit 110 includes a first magnetic composite sheet including first and second magnetic metal powders P1 and P2 and a first insulating resin R1 on one surface and the other surface of the support substrate 200 to be described later. It may be formed by stacking one or more in the width direction (W). Since the active part 110 includes the first magnetic metal powder P1 having a relatively large particle diameter and the second magnetic metal powder P2 having a relatively small particle diameter, the particle diameter is smaller than the particle diameter of the first magnetic metal powder P1. Compared to the first to fourth cover parts 121 , 122 , 123 , 124 including only the third and fourth magnetic metal powders P3 and P4 of particle size, the filling rate of the magnetic metal powders P1 and P2 is relatively high. can be high The filling rate of the magnetic metal powder refers to a unit volume of each of the active part 110 and the cover parts 121, 122, 123, and 124 (eg, a unit volume of 10 µm in length * 10 µm in width * 10 µm in thickness). may mean the total volume or total mass occupied by the magnetic metal powder in Meanwhile, in the following, for convenience of explanation, the magnetic metal powder P1 and P2 of the active part 110 includes only the first magnetic metal powder P1 and the second magnetic metal powder P2 having different particle diameters. However, the scope of the present invention is not limited thereto. For example, as another non-limiting example of the present invention, the magnetic metal powders P1 , P2 , and P3 of the active part 110 may include three types of powders having different particle diameters.

The first and second cover parts 121 and 122 are respectively disposed on an upper surface and a lower surface of the active part 110 facing in the thickness direction (T). In general, a plurality of individual parts may be collectively formed by manufacturing a coil bar in which a plurality of bodies are connected to each other and then separating the plurality of bodies through dicing. On the other hand, in the case of a horizontally disposed component in which one surface of the support substrate is disposed parallel to the mounting surface of the component, the dicing surface does not constitute the upper and lower surfaces of the body in individual components. However, in the case of a vertically disposed component in which one surface of the support substrate is disposed perpendicular to the mounting surface, the upper and lower surfaces of the body correspond to cut surfaces formed by dicing. Due to this, at least a portion of the magnetic metal powder contained in the body is cut by the dicing blade and exposed to the upper and lower surfaces of the body. Due to the powder, plating spreads on the upper and lower surfaces of the body, which may cause a short-circuit defect in the external electrode. In the present embodiment, the above-described problem can be solved by disposing the first and second cover parts 121 and 122 on the upper and lower surfaces of the active part 110, which are the dicing surfaces. That is, in the present embodiment, at least a portion of the first and second magnetic metal powders P1 and P2 is cut on the upper and lower surfaces of the activator 110 to expose the cut surfaces (particularly, the first and second magnetic metal powders P1 and P2). 1 The magnetic metal powder P1 is often cut and exposed), and the first and the third magnetic metal powder P3 and the second insulating resin R2 are formed on the upper and lower surfaces of the active part 110, respectively. By disposing the second cover parts 121 and 122 , the conductive core of magnetic metal powder exposed to the upper and lower surfaces of the active part 110 may be covered. That is, the first and second cover parts 121 and 122 cover the upper and lower surfaces of the active part 110 , which are cut surfaces of the active part 110 . For this reason, the conductive core of the magnetic metal powder P1 , P2 , and P3 is not exposed to the upper and lower surfaces of the body 100 . Accordingly, in plating the external electrodes 410 and 420 , plating spread occurring on the upper and lower surfaces of the body 100 may be reduced. Since the first and second cover parts 121 and 122 include the third magnetic metal powder P3 having a particle diameter smaller than that of the first magnetic metal powder P1, the upper and lower surfaces of the body 100 are The surface roughness of the surfaces of the first and second cover parts 121 and 122 may be reduced. Pad portions 411 and 421 and band portions 413 and 423 of external electrodes 410 and 420 to be described later are disposed on the upper and lower surfaces of the body 100 , and relatively low surfaces of the upper and lower surfaces of the body 100 . Appearance defects of the external electrodes 410 and 420 may be reduced due to the illuminance, and the pad parts 411 and 421 and the band parts 413 and 423 of the external electrodes may be uniformly formed. The particle diameter of the third magnetic metal powder P3 and the particle diameter of the second magnetic metal powder P2 may be the same, and in this case, process easiness may increase. The second insulating resin (R2) may be different from the first insulating resin (R1), but the scope of the present invention is not limited thereto, and the first and second insulating resins (R1, R2) are, for example, By including the same resin such as an epoxy resin, the bonding force between the active part 110 and the first and second cover parts 121 and 122 may be improved. Meanwhile, when the first and second cover parts 121 and 122 are formed, since the active part 110 is in a state where curing is completed, each of the first and second cover parts 121 and 122 and the active part 110 . A boundary surface may be formed therebetween. The first and second cover parts 121 and 122 may be formed by a sheet lamination method or a paste application method, but the scope of the present invention is not limited thereto.

The third and fourth cover parts 123 and 124 are disposed on both surfaces of the active part 110 facing in the width direction T, respectively. That is, based on the direction of FIG. 1 , the third cover part 123 is disposed on the front surface of the active part 110 to form the third surface 103 of the body 100 , and the fourth cover The part 124 is disposed on the rear surface of the active part 110 to form the fourth surface 103 of the body 100 . The third and fourth cover parts 123 and 124 may include a fourth metal having a particle diameter smaller than that of the first magnetic metal powder P1 in the process of laminating the first magnetic composite sheet for forming the active part 110 . A second magnetic composite sheet including the magnetic powder P4 and the third insulating resin R3 is disposed on the first magnetic composite sheet disposed on the outermost side in the width direction W, and the first and second magnetic composite sheets It can be formed by laminating together. That is, unlike the first and second cover parts 121 and 122 , the third and fourth cover parts 123 and 124 may be formed together in the same process as the active part 110 . Since the first and second cover parts 121 and 122 form the third and fourth surfaces 103 and 104 of the body 100 , an appearance defect of the body 100 can be reduced. A particle diameter of the fourth magnetic metal powder P4 may be the same as a particle diameter of the third magnetic metal powder P3 , and may be the same as a particle diameter of the second magnetic metal powder P2 . The third insulating resin R3 may include the same resin as that of the first insulating resin R1, but the scope of the present invention is not limited thereto. Meanwhile, for reasons of the above-described process, the upper surface of the active part 110 and the upper surfaces of the third and fourth cover parts 123 and 124 are coplanar with each other, and the lower surface of the active part 110 and the third and lower surfaces of the fourth cover parts 123 and 124 may be coplanar with each other. In addition, for reasons of the above-described process, at least a portion of the upper and lower surfaces of the third and fourth cover parts 123 and 124 that are coplanar with each of the upper and lower surfaces of the active part 110 can be covered. there is.

Each of the first to fourth cover parts 121 , 122 , 123 , and 124 may have a thickness of 20 μm to 30 μm. Here, the thickness of the first and second cover parts 121 and 122 may mean the length of the first and second cover parts 121 and 122 in the thickness direction T, The thickness of the third and fourth cover parts 123 and 124 may mean the length of the third and fourth cover parts 123 and 124 in the width direction W. For example, when the thickness of the first cover part 121 is less than 20 μm, it is difficult to secure insulation between the external electrodes 410 and 420 , so that a short-circuit may occur between the external electrodes 410 and 420 . There is this. For example, when the thickness of the first cover part 121 is greater than 30 μm, the thickness of the entire component may increase.

Metal magnetic powder (P1, P2, P3, P4), iron (Fe), silicon (Si), chromium (Cr), cobalt (Co), molybdenum (Mo), aluminum (Al), niobium (Nb), It may include any one or more selected from the group consisting of copper (Cu) and nickel (Ni). For example, the magnetic metal powder (P1, P2, P3, P4) is pure iron powder, Fe-Si alloy powder, Fe-Si-Al alloy powder, Fe-Ni alloy powder, Fe-Ni-Mo Alloy powder, Fe-Ni-Mo-Cu alloy powder, Fe-Co alloy powder, Fe-Ni-Co alloy powder, Fe-Cr alloy powder, Fe-Cr-Si alloy powder, Fe-Si- It may be at least one of Cu-Nb-based alloy powder, Fe-Ni-Cr-based alloy powder, and Fe-Cr-Al-based alloy powder.

The magnetic metal powders P1, P2, P3, and P4 may be amorphous or crystalline. For example, the magnetic metal powder (P1, P2, P3, P4) may be an Fe-Si-B-Cr-based amorphous alloy powder, but is not necessarily limited thereto. Each of the magnetic metal powders P1, P2, P3, and P4 may have an average diameter of about 0.1 μm to 30 μm, but is not limited thereto.

In each of the magnetic metal powders P1, P2, P3, and P4, the conductive core, which is the aforementioned material, and an insulating coating layer covering the surface of the core may be disposed.

The insulating resins R1, R2, and R3 may include, but are not limited to, epoxy, polyimide, liquid crystal polymer, etc. alone or in combination.

The body 100 has a core C penetrating through the support substrate 200 and the coil unit 300 to be described later. The core C may be formed by filling the through-holes of the coil unit 300 with the magnetic composite sheet, but is not limited thereto.

The support substrate 200 is disposed in the body 100 , and one surface is perpendicular to the lower surface 106 of the body 100 . The support substrate 200 is configured to support the coil unit 300 to be described later. On the other hand, saying that one surface of the support substrate 200 is perpendicular to the lower surface 106 of the body 100 means, for example, one surface of the support substrate 200 and the lower surface of the body 100 including vertical in a mathematical sense. (106) may mean forming an angle of 80 degrees to 100 degrees.

The support substrate 200 is formed of an insulating material including a thermosetting insulating resin such as an epoxy resin, a thermoplastic insulating resin such as polyimide, or a photosensitive insulating resin, or a reinforcing material such as glass fiber or an inorganic filler impregnated in this insulating resin. It may be formed of an insulating material. For example, the support substrate 200 may include a prepreg, Ajinomoto Build-up Film (ABF), FR-4, Bismaleimide Triazine (BT) resin, Photo Imagable Dielectric (PID), and Copper Clad Laminate (CCL). ), but is not limited thereto.

As inorganic fillers, silica (SiO ₂ ), alumina (Al ₂ O ₃ ), silicon carbide (SiC), barium sulfate (BaSO ₄ ), talc, mud, mica powder, aluminum hydroxide (Al(OH) ₃ ), magnesium hydroxide (Mg(OH) ₂ ), calcium carbonate (CaCO ₃ ), magnesium carbonate (MgCO ₃ ), magnesium oxide (MgO), boron nitride (BN), aluminum borate (AlBO ₃ ), barium titanate (BaTiO ₃ ) and zirconic acid At least one selected from the group consisting of calcium (CaZrO ₃ ) may be used.

When the support substrate 200 is formed of an insulating material including a reinforcing material, the support substrate 200 may provide more excellent rigidity. When the support substrate 200 is formed of an insulating material that does not include glass fibers, the support substrate 200 is advantageous in reducing the width of the component by reducing the overall thickness of the coil unit 300 . When the support substrate 200 is formed of an insulating material including a photosensitive insulating resin, the number of processes for forming the coil unit 300 is reduced, which is advantageous in reducing production costs and forming fine vias.

The coil unit 300 is disposed on at least one surface of the support substrate 200 . The coil unit 300 is embedded in the body 100 to express the characteristics of the coil component. For example, when the coil component 1000 of the present embodiment is used as a power inductor, the coil unit 300 stores an electric field as a magnetic field to maintain an output voltage, thereby stabilizing the power of the electronic device.

The coil unit 300 is formed on at least one of both surfaces of the support substrate 200 facing each other, and forms at least one turn. The coil unit 300 is disposed on one surface and the other surface of the support substrate 200 facing each other in the width direction W of the body 100 .

The coil unit 300 includes coil patterns 311 and 312 , vias 321 , and lead patterns 331 and 332 . Specifically, each of the first coil pattern 311 and the second coil pattern 312 may be in the form of a plane spiral in which at least one turn is formed about the core C of the body 100 as an axis. . For example, based on the direction of FIG. 1 , the first coil pattern 311 may form at least one turn on the back surface of the support substrate 200 with the core C as an axis. The second coil pattern 312 forms at least one turn on the front surface of the support substrate 200 with the core C as an axis. The first drawing pattern 331 is disposed on the rear surface of the support substrate 200 , is connected to the first coil pattern 311 , and is exposed to the first surface 101 of the body 100 . The second lead-out pattern 332 is disposed on the front surface of the support substrate 200 , is connected to the second coil pattern 312 , and is exposed to the second surface 102 of the body 100 . The via 321 passes through the support substrate 200 to connect innermost ends of each of the first and second coil patterns 311 and 312 to each other. By doing this, the coil unit 300 functions as one coil connected as a whole.

At least one of the coil patterns 311 and 311 , the vias 321 and the lead patterns 331 and 332 may include at least one conductive layer.

For example, when the second coil pattern 312 , the via 321 , and the second lead-out pattern 332 are formed by plating on the front surface of the supporting substrate 200 (in the direction of FIG. 1 ), the second coil pattern Each of the 312 , the via 321 , and the second lead-out pattern 332 may include a seed layer and an electrolytic plating layer. The seed layer may be formed by an electroless plating method or a vapor deposition method such as sputtering. Each of the seed layer and the electroplating layer may have a single-layer structure or a multi-layer structure. The multi-layered electrolytic plating layer may be formed in a conformal film structure in which one electrolytic plating layer is covered by another electrolytic plating layer, and the other electrolytic plating layer is laminated on only one surface of one electroplating layer. It may be formed in a shape. The seed layer of the second coil pattern 312 , the seed layer of the via 321 , and the seed layer of the second lead-out pattern 332 may be integrally formed so that a boundary may not be formed between them, but is not limited thereto. The electroplating layer of the second coil pattern 312 , the electroplating layer of the via 321 , and the electroplating layer of the second lead-out pattern 332 are integrally formed so that a boundary may not be formed between them, but is not limited thereto.

Each of the coil patterns 311 and 311 , the via 321 , and the lead-out pattern 331 includes copper (Cu), aluminum (Al), silver (Ag), tin (Sn), gold (Au), and nickel (Ni). and a conductive material such as lead (Pb), titanium (Ti), chromium (Cr), molybdenum (Mo), or an alloy thereof, but is not limited thereto.

In the present embodiment, since the coil unit 300 is disposed perpendicular to the sixth surface 106 of the body 100 as the mounting surface, the mounting area is reduced while maintaining the volume of the body 100 and the coil unit 300 . can do it For this reason, a larger number of electronic components can be mounted on a mounting board having the same area. In addition, in the present embodiment, since the coil unit 300 is disposed perpendicular to the sixth surface 106 of the body 100 as the mounting surface, the direction of the magnetic flux induced by the coil unit 300 is the body 100 . It is arranged parallel to the sixth surface 106 of the. Accordingly, noise induced to the mounting surface of the mounting substrate may be relatively reduced.

The insulating layer IF is used to insulate the coil unit 300 from the body 100 and may include a well-known insulating material such as paraline, but is not limited thereto. The insulating film IF may be formed by a method such as vapor deposition, but is not limited thereto, and may be formed by laminating an insulating film on both surfaces of the support substrate 200 .

When the coil component 1000 according to the present embodiment is mounted on a printed circuit board, the external electrodes 410 and 420 electrically connect the coil component 1000 to the printed circuit board or the like. For example, the coil component 1000 according to the present embodiment may be mounted so that the sixth surface 106 of the body 100 faces the upper surface of the printed circuit board, and is spaced apart from each other on the sixth surface of the body 100 . The disposed external electrodes 410 and 420 may be electrically connected to a connection portion of the printed circuit board.

The external electrodes 410 and 420 are spaced apart from each other on the sixth surface 106 of the body 100 and are respectively connected to the drawing patterns 331 and 332 . Specifically, the first external electrode 410 includes the first pad portion 411 disposed on the sixth surface 106 of the body 100 , and the first surface of the body 100 from the first pad portion 411 . a first extension portion 412 extending to 101 , and a first band portion 413 extending from the first extension portion 412 to the fifth surface 105 of the body 100 . The first extension 412 is connected to the first drawing pattern 331 exposed to the first surface 101 of the body 100 . The second external electrode 420 includes a second pad portion 421 disposed on the sixth surface 106 of the body 100 , and the second surface 102 of the body 100 from the second pad portion 421 . It includes a second extension portion 422 extending to the , and a second band portion 423 extending from the second extension portion 422 to the fifth surface 105 of the body 100 . The second extension 422 is connected to the second drawing pattern 331 exposed to the second surface 102 of the body 100 . That is, each of the first and second external electrodes 410 and 411 is formed in a U-shape as a whole. For example, the thickness of each of the pad parts 411 and 421 and the band parts 413 and 423 may be 20 µm, and the thickness of the extension parts 412 and 422 may be 30 µm, but the scope of the present invention is limited thereto. it is not going to be Here, the thickness of the pad parts 411 and 421 and the band parts 413 and 423 means the length (dimension) of the pad parts 411 and 421 and the band parts 413 and 423 along the thickness direction T. , and the thickness of the extension parts 412 and 422 may mean the length of the extension parts 412 and 422 along the width direction W.

The external electrodes 410 and 420 are copper (Cu), aluminum (Al), silver (Ag), tin (Sn), gold (Au), nickel (Ni), lead (Pb), chromium (Cr), titanium. It may be formed of a conductive material such as (Ti) or an alloy thereof, but is not limited thereto.

Each of the external electrodes 410 and 420 may be formed in a multi-layered structure. For example, each of the external electrodes 410 and 420 may include a first metal layer disposed on the body 100 , a second metal layer disposed on the first metal layer, and a third metal layer disposed on the second metal layer. The first metal layer may be formed by vapor deposition such as sputtering, electroplating, or paste application. In the case of the paste application method, it means that a conductive paste including a conductive powder such as copper (Cu) and/or silver (Ag) and a thermosetting resin is applied to the surface of the body 100 and cured. Each of the second and third metal layers may be formed by electroplating. As a non-limiting example, the first metal layer may be a copper plating layer, the second metal layer may be a nickel plating layer, and the third metal layer may be a tin plating layer, but the scope of the present invention is not limited thereto.

By doing this, the coil component 1000 according to the present embodiment prevents plating spread on the upper and lower surfaces of the body 100, and short circuit between the external electrodes 410 and 420 when plating the external electrodes 410 and 420 is formed. (short-circuit) can be prevented. In addition, by adding the first cover layer 121 on the top surface of the active part 110 while minimizing the distance between the upper surface of the active part 110 and the coil part 300 in order to lower the overall thickness of the part, A margin in the thickness direction (T) can be secured.

4 is a view schematically showing a coil component according to another embodiment of the present invention. FIG. 5 is a view showing a cross-section taken along line III-III′ of FIG. 4 . FIG. 6 is a view showing a cross-section taken along line IV-IV' of FIG. 4 . On the other hand, in the case of FIG. 5, the cross section taken along line III-III' of FIG. 4 is a reference, but for convenience of explanation, the internal structure of the coil component is shown.

1 to 3 and 4 to 6 , the coil component 2000 according to the present embodiment includes first and second covers when compared with the coil component 1000 according to an embodiment of the present invention. The parts 121 and 122 and the external electrodes 410 and 420 are different. Therefore, in the description of the present embodiment, only the first and second cover parts 121 and 122 and the external electrodes 410 and 420 that are different from the embodiment of the present invention will be described. For the rest of the configuration of the present embodiment, the description in one embodiment of the present invention may be applied as it is.

4 to 6 , the first and second cover parts 121 and 122 applied to the coil component 2000 according to the present embodiment have the upper and lower surfaces of the active part 110 in the longitudinal direction ( L) is placed in only some of them. Specifically, the first cover part 121 covers the entire upper surface of the active part 110 in the width direction (W), but the upper surface of the active part 110 is disposed only at the central part in the longitudinal direction (L) to form the active part It does not cover both ends in the longitudinal direction L of the upper surface of 110 . The second cover part 122 covers the entire width direction W of the lower surface of the active part 110 , but is disposed only in the central part in the longitudinal direction L of the lower surface of the active part 110 to protect the active part 110 . Both ends in the longitudinal direction L of the lower surface are not covered. As a result, the pad parts 411 and 421 and the band parts 412 and 422 of the external electrodes 410 and 420 come into contact with the lower and upper surfaces of the active part 110 , respectively. That is, the first cover part 121 covers only the spaced space between the band parts 413 and 423 of the upper surface of the active part 110 , and the second cover part 122 is a pad part of the lower surface of the active part 110 . Only the spaced space between (411, 421) is covered. In the present embodiment, since the first and second cover parts 121 and 122 are disposed only in some regions of the upper and lower surfaces of the active part 110 , the thickness of the entire component may be reduced. In addition, since the first and second cover parts 121 and 122 are disposed in the space between the band parts 413 and 423 and the space between the pad parts 411 and 421 , the external electrodes 410 and 420 are formed by plating. A short-circuit between the electrodes 410 and 420 may be prevented.

7 is a view schematically showing a coil component according to another embodiment of the present invention. FIG. 8 is a view showing a cross section taken along line V-V' of FIG. 7 . Fig. 9 is a view showing a cross section taken along line VI-VI' of Fig. 7; Meanwhile, in the case of FIG. 8, the cross section taken along the line V-V' of FIG. 7 is a reference, but for convenience of explanation, the internal structure of the coil component is shown.

Referring to FIGS. 1 to 3 and FIGS. 7 to 9 , the coil part 3000 according to the present embodiment is a coil part 300 when compared with the coil part 1000 according to an embodiment of the present invention. The withdrawal patterns 331 and 332 are different. Therefore, in describing the present embodiment, only the drawing patterns 331 and 332 different from those in the embodiment of the present invention will be described. For the rest of the configuration of the present embodiment, the description in one embodiment of the present invention may be applied as it is.

7 to 9 , in the coil unit 300 applied to the coil component 3000 according to the present embodiment, drawing patterns 331 and 332 are exposed to the lower surface of the active unit 110 . Specifically, the first lead-out pattern 331 and the second lead-out pattern 332 are exposed on the lower surface of the active part 110 in a spaced apart form, and are not exposed to the other surface of the body 100 . For this reason, the coil component 3000 according to the present embodiment can easily implement the structure of the bottom electrode of the component.

In the present embodiment, the external electrodes 410 and 420 are, for example, formed in an L shape as a whole as shown in FIGS. 7 to 9 . Specifically, the first external electrode 410 includes a first pad part 411 disposed on the lower surface of the active part 110 , and extending from the first pad part 411 to the first surface of the body 100 . It has a first extension 412 . The second external electrode 420 includes a first pad part 411 disposed on the lower surface of the active part 110 , and a first extension extending from the first pad part 411 to the first surface of the body 100 . It has a portion 412 . However, since the shapes of the external electrodes 410 and 420 shown in FIGS. 7 to 9 are merely exemplary, the scope of the present embodiment is not limited thereto.

In the above, although an embodiment of the present invention has been described, those of ordinary skill in the art can add, change or delete components within the scope that does not depart from the spirit of the present invention described in the claims. Various modifications and variations of the present invention will be possible, which will also be included within the scope of the present invention.

100: body
200: support substrate
300: coil unit
311, 312: coil pattern
321: via
331, 332: withdrawal pattern
410, 420: external electrode
411, 421: pad part
412, 422: extension
413, 423: band unit
C: core
P1, P2, P3, P4: magnetic metal powder
R1, R2, R3: Insulation resin
IF: insulating film
1000, 2000, 3000: coil parts

Claims (13)

a body having an upper surface and a lower surface facing each other in a thickness direction;
a support substrate disposed in the body and having one surface perpendicular to the lower surface of the body;
a coil unit disposed on at least one surface of the support substrate; and
first and second external electrodes spaced apart from each other on the lower surface of the body and connected to the coil unit, respectively; including,
The body includes an active part that covers the coil part, and first and second cover parts respectively disposed on upper and lower surfaces of the active part facing in the thickness direction,
The active part includes a first magnetic metal powder, a second magnetic metal powder having a particle diameter smaller than that of the first magnetic metal powder, and a first insulating resin,
Each of the first and second cover parts comprises a third magnetic metal powder and a second insulating resin having a particle diameter smaller than that of the first magnetic metal powder,
coil parts.
The method of claim 1,
At least a portion of the first magnetic metal powder is cut and exposed on each of the upper and lower surfaces of the active part,
coil parts.
3. The method of claim 2,
The particle diameter of the second magnetic metal powder and the particle diameter of the third magnetic metal powder are the same as each other,
coil parts.
3. The method of claim 2,
The body is
Including a fourth magnetic metal powder and a third insulating resin having a particle diameter smaller than that of the first magnetic metal powder, and further comprising third and fourth cover parts disposed on both side surfaces of the active part facing in the width direction,
coil parts.
5. The method of claim 4,
The particle diameter of the fourth magnetic metal powder and the particle diameter of the third magnetic metal powder are the same,
coil parts.

5. The method of claim 4,
The first and second cover parts,
extending from each of the upper and lower surfaces of the active part to cover at least a portion of each of the upper and lower surfaces of the third and fourth cover parts facing in the thickness direction;
coil parts.
7. The method of claim 6,
An upper surface of the active part and an upper surface of each of the third and fourth cover parts are coplanar with each other,
coil parts.
According to claim 6,
The body further has one end face and the other end face facing each other in the longitudinal direction,
Each of the first and second external electrodes includes a pad part spaced apart from each other on a lower surface of the active part, an extension part extending from the pad part to one end surface and the other end surface of the body, and each other on the upper surface of the active part Including a band portion spaced apart,
coil parts.
9. The method of claim 8,
The first and second cover parts cover the entire upper and lower surfaces of the active part,
Each of the band portion and the pad portion is disposed on the first and second cover portions,
coil parts.
9. The method of claim 8,
Each of the band portion and the pad portion is in contact with each of the upper and lower surfaces of the active portion,
The first and second cover parts are disposed in a space between the pad part on the lower surface of the active part and in a space between the band part on the upper surface of the active part,
coil parts.
According to claim 6,
The body further has one end face and the other end face facing each other in the longitudinal direction,
Each of the first and second external electrodes includes a pad part spaced apart from each other on a lower surface of the active part, and an extension part extending from the pad part to one end surface and the other end surface of the body;
The pad part is in contact with the lower surface of the active part,
The second cover part is disposed in a space between the pad parts of the lower surface of the active part,
The first cover part covers the entire upper surface of the active part,
The extension part contacts the side surface of the first cover part, and does not extend onto the upper surface of the first cover part,
coil parts.
a body having a lower surface;
a support substrate disposed in the body and having one surface perpendicular to the lower surface; and
and a coil unit disposed on at least one surface of the support substrate;
The body includes an active part that covers the coil part, and first to fourth cover parts disposed on an upper surface, a lower surface, one side, and the other side of the active part, respectively,
Each of the active part and the first to fourth cover parts includes a magnetic metal powder and an insulating resin,
The filling ratio of the magnetic metal powder of the active part is greater than the filling ratio of the magnetic metal powder of each of the first to fourth cover parts,
coil parts.
13. The method of claim 12,
Each of the first cover part disposed on the upper surface of the active part and the second cover part disposed on the lower surface of the active part forms a boundary with the upper surface and the lower surface of the active part,
At least a portion of the magnetic metal powder is cut and exposed at the interface,
coil parts.

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